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Transactions of the American Mathematical Society
Transactions of the American Mathematical Society
ISSN 1088-6850(online) ISSN 0002-9947(print)

 

Ljusternik-Schnirelman theory in partially ordered Hilbert spaces


Authors: Shujie Li and Zhi-Qiang Wang
Journal: Trans. Amer. Math. Soc. 354 (2002), 3207-3227
MSC (2000): Primary 35J20, 35J25, 58E05
Published electronically: April 3, 2002
MathSciNet review: 1897397
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Abstract: We present several variants of Ljusternik-Schnirelman type theorems in partially ordered Hilbert spaces, which assert the locations of the critical points constructed by the minimax method in terms of the order structures. These results are applied to nonlinear Dirichlet boundary value problems to obtain the multiplicity of sign-changing solutions.


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Additional Information

Shujie Li
Affiliation: Institute of Mathematics, Academy of Mathematics and Systems Sciences, Academia Sinica, Beijing 100080, P.R. China
Email: lisj@math03.math.ac.cn

Zhi-Qiang Wang
Affiliation: Department of Mathematics and Statistics, Utah State University, Logan, Utah 84322
Email: wang@math.usu.edu

DOI: http://dx.doi.org/10.1090/S0002-9947-02-03031-3
PII: S 0002-9947(02)03031-3
Keywords: Ljusternik-Schnirelman theory, order structure, minimax method, sign-changing solutions
Received by editor(s): November 1, 2001
Published electronically: April 3, 2002
Article copyright: © Copyright 2002 American Mathematical Society